Flexible wrinkle coated material and method of producing same



Patented Feb. 1,1949

FLEXIBLE WRINKL E COATED MATERIAL AND METHOD OF PRODUCING SAME Nathan T.Beynon, Dayton.

Wilmington, Del., a corpora- New Wrinkle, Inc., tion of Delaware NDrawing.

Original a 1946, Serial No. 656,173.

Ohio, assignor to ppiication March 21,

Divided and this application May 21, 1948, Serial No. 28,530

11 Claims.

This application is a division of my copending application, Serial No.656,173, filed March 21,

' This invention relates to wrinkle coated flexible materials and themethod of making them.

Hitherto wrinkle drying coating compositions have been of two types:varnish type and alkyd type.

Varnish type wrinkle drying coating compositions consist essentially ofa varnish base including a wrinkling oil in admixture with drier andsolvent; while alkyd base wrinkle drying coating compositions consistessentially of an alkyd resin in admixture with drier and a solvent.

The production of both varnish base and alkyd base wrinkle dryingcoating compositions requires cooking of the components at one state oranother of the process. The purpose of the present invention is toproduce a new type of wrinkle drying coating composition wherein thecooking step is omitted and to utilize such compositions for themanufacture of wrinkle coated flexible materials. In other words, thecoating compositions which are to be used according to the presentinvention are prepared by compounding the component parts thereofwithout the necessity of cooking.

For this purpose, a wrinkling oil (that is to say, an oil which includesconjugated double bonds in its chemical structure) is admixed with asolution of polyvinyl chloride in solvent in a ratio of from parts to 50parts of synthetic rubber (dry basis) to 100 parts of wrinkling oil.

The polyvinyl chloride solution may be prepared by dissolving it in anyof many solvents suitable therefor or in mixtures thereof. As indicativeof solvents useable for the purpose, the following table is given:

Excellent Fair to Good Dlluents nitromothane acetone benzene nitroethanemethyl ethyl ketone toluene l-nitropropane methyl isobutyl kexylene one2-nitropropane ethyl acetate other similar aromatic solvents ethylenedichloride butyl acetate chloroform trichloroethylene naphthachlorobenzene beta-trichloroethylene benzine chlorotoluene 1,2,3trlchloroetliyleno mixed dichloropendioxane tanes dioxolane The mostcomplete and rapid solubility is obtalned with solvents in theExcellent" column; however, solvents in the "Fair to good column aresatisfactory in most instances. Solvents in paste is thoroughly blended2 the Diluent" to cut or thin solutions of polyvinyl chloride insolvents or mixtures of solvents in the "Excellent and Fair to good"columns.

Including nitro aliphatic solvents retards gelling, The chlorinatedsolvents reduce fire and explosion hazards. The esters and ketonesreduce cost and health hazards. The aromatics reduce cost. as do thepetroleum hydrocarbons. The following are typical to ulas, proportionsbeing by volume:

a Per cent 1. Nitrobenzene or nitromethane 10-30 Naphtha, toluene orxylene 90-70 2. Ethylene dichloride 10-30 Naphtha, toluene or xylene90-70 3. Chlorotoluene or chlorobenzene 10-30 Naphtha, toluene or xylene90-70 4. Chlorobenzene 10-30 Methyl ethyl ketone 90-70 5. Nitroethane10-30 Methyl ethyl ketone 90-70 6. Chlorotoluene 10-30 Diisopropylketone 90-70 7. Chlorotoluene 10-20' Nitroethane 10-20 Naphtha, tolueneor xylene -60 8. Ethylene dichloride 10-20 Chlorobenzene 10-20 Methylethyl ketone 80-60 9. Butyl acetate 33 Chlorobenzene 33 Acetone 33 /310. Ethylene dichloride 10 Toluene l0 Benzene 80 11. l-nitropropane 25.

Acetone 50 Benzene 25 Obviously, many other combinations may be employedsuccessfully for the purpose.

To the resulting mixture may be added, if so desired, from 40 to 80 percent of a pigment paste comprising for example, two-thirds pigment andone-third wrinkling oil by weight. This pigment into the mixture ofsynthetic rubber solution and wrinkling oil to produce a. homogeneouscomposition.

To this homogeneous composition is added a quantity of solvent such asnaphtha, toluene, xylene or mixtures thereof, or any other solvent suchas customarily employed in varnish formulations, in quantity suiilcientto produce a coating of the desired viscosity. I

For example, a coating of suitable viscosity column should be employedonly for application by spreading may consist of 40 parts by weight ofpolyvinyl chloride, 100 parts by weight of wrinkling oil, 60 parts byweight of pigment paste, and 10 parts by weight of naphtha. The use ofpolyvinyl chloride solutions in admixture with wrinkling oils forproducing wrinkle drying coating composition is new in the art; in fact,it has been hitherto considered impossible to use this resin in wrinkledrying coating compositions of any sort because it acted as an inhibitorof wrinkle formation.

Wrinkle patterns or textures tainable may be produced varying hithertounobthe amount of polyvinyl chloride employed in the formulation.

In addition, this new type of wrinkle drying coating compositionresponds to temperature variation during the initial drying or texturingperiod to such an extent that a great variety of textures or patternsmay be obtained. It is believed that the underlying theory governing theproduction of wrinkle drying coating composition including polyvinylchloride is as follows:

The mixture of polyvinyl chloride and wrinkling oil consists of twocomponentswhich are compatible with each other at the time and under theconditions of mixing and applying; however, during the drying rfilm-forming period these ingredients separate into distinct phases, andthereby the texture of the wrinkle pattern is altered depending on therelative proportion or ratio of the two component parts. It will beunderstood, of course, that this theory is offered merely in explanationof observed facts, and that it is not intended thereby to limit thisinvention.

Polyvinyl chloride may be employed successfully in ratios of from partsto 50 parts to each 100 parts of wrinkling oil, and has been 50 employedin the practice of this invention.

As has been noted hereinbefore, wrinkling oils are oils which includeconjugated double bonds in their chemical structure. They may be nativeoils such as tung oil and oiticica oil, or they may be modifled oilssuch as dehydrated castor oil (either blown or unblown), blown linseedoil and alkali isomerized oils prepared from normally non-drying oilssuch as peanut oil and cottonseed oil, or they may be any other type offatty oil which includes conjugated double bonds in its chemicalstructure either in the native state or after treatment causingconjugation of isolated double bonds.

It has been found that wrinkle drying compositions made according to themethod described above are qualified par excellence for the manufactureof wrinkle coated flexible materials. Thus, paper, fabrics, leather,cork and similar flexible materials may be successfully coated withthese uncooked rubber solution-wrinkling oil mixtures, and materials areobtained thereby in which the flexibility has been retained completelyor to an unusually high degree.

The compositions may be applied by spraying, spreading and rolling. Theresulting film is then dried in an oven or other drying equipment knownto those skilled in the art. An initial drying step at 130 F. for 30minutes and subsequent drying at 180 F. for a period of from 30 to 60minutes, for example, has been found to give very satisfactory results.

The polyvinyl chloride solution-wrinkling oil coating composition may beapplied immediately to the flexible base material. However,intermediary, socalled base coats known to the a it er spirit of thisdisclosure and in one simple layeror in multiple layers, may be appliedprior to using the wrinkle coating proper. It will be understood thatwhile there have been given herein certain specific examples of thepractice or this invention, it is not intended thereby to have thisinvention limitedto or circumscribed by the speciflcdetails ofmaterials, proportions, or conditions herein specified, in view of thefact that this invention may be modifled according to individualpreference or conditions without necessarily departing from the thescope of the appended claim. A

I claim: l. The method or manufacturing flexible, wrinkle-coatedmaterials comprising the steps of mixing at room temperature 100 partsby weight of unsaturated fatty oil with varnish solvent and a solutionof from 10 to 50 parts by weight of polyvinyl chloride, applying themixture thus obtained to a base material, and subjecting the' coatedmaterial to drying.

2. The method of manufacturing flexible. wrinkle-coated materialscomprising the steps of mixing at room temperature 100 parts by weightof unsaturated fatty oil with varnish solvent and a solution of 40 partsby weight of polyvinyl chloride, applying the mixture thus obtained to abase material, and subjecting the coated material to drying.

3. The method of manufacturing flexible, wrinkle-coated materialscomprising the steps of mixing at room temperature 100 parts by weightof unsaturated fatty oil with varnish solvent and a solution of from 10to 50 parts by weight of polyvinyl chloride, admixing pigment paste tothe mixture, applying the mixture thus obtained to a base material, andsubjecting the coated material to drying.

4. The method of manufacturing flexible, wrinkle-coated materialscomprising the steps of mixing at room temperature 100 parts by weightof unsaturated fatty oil with varnish solvent and a solution of from 10to 50 parts by weight of polyvinyl chloride, admixing pigment paste tothe mixture, said pigment paste comprising twothirds by weight ofpigment and one-third by weight of said oil, applying the mixture thusobtained to a base material, and subjecting the coated material todrying.

5. The method of manufacturing flexible, wrinkle-coated materialscomprising the steps of mixing at room temperature 100 parts by weightof unsaturated fatty oil with varnish solvent.

and a solution of from 10 to 50 parts by weight of polyvinyl chloride,admixing 40 to \parts by weight of pigment paste to the mixture,applying the mixture thus obtained to a base material, and subjectingthe coated material to drying.

6. The method of manufacturing flexible, wrinkle-coated materialscomprising the steps of mixing at room temperature parts by weight ofunsaturated fatty oil with varnish solvent and a solution of from 10 to50 parts by weight of polyvinyl chloride, applying the mixture thusobtained to a base material, and subjecting the coated material todrying at substantially F. for approximately 30 minutes and then atsubstantially F. for a period of from about 30 to 60 minutes.

'7. A flexible wrinkle-coated material comprising a flexible base and acoating thereon, said coating comprising 100 parts by weight ofunsaturated fatty oil and a solution of from 10 to 8 50 parts by weightoi polyvinyl chloride admixed at room temperature.

8. A flexible, wrinkle-coated'material comprising a flexible base and acoating thereon, said coating comprising 100 parts by weight ofunsaturated fatty oil and a solution of 40 parts by weight of polyvinylchloride admixed at room temperature.

9. A flexible, wrinkle-coated material comprising a flxible base and acoating thereon, said coating comprising 100 parts by weight ofunsaturated fatty oil, a solution of from 10 to 50 parts by weight ofpolyvinyl chloride and pigment paste admixed at room temperature.

10. A flexible, wrinkle-coated material comprising a flexible base and acoating thereon, said oi two-thirds by weight of pigment and one-thirdby weight of said oil, said ingredients being admixed at roomtemperature.

NATHAN T. BEYNON.

No references cited.

